






const express = require('express')
const app = express()
app.get('/',(req,res)=>{
  // console.log(req.query.fn)
  const fn = req.query.fn
  var arr = [1,2,3]
  res.send(fn+ '('+JSON.stringify(arr)+')')
})
app.listen(2000,()=>{
  console.log('http://127.0.0.1:2000')
  
})